Research Article

Influence of Structural Parameters of Gearbox Seal System of Electrical Multiple Units on Seal Performance

Table 1

The droplet state after collision with a humid wall [13, 14].

Oil droplet stateCritical Weber number Wec

Stick → reboundWec ≈ 1
Rebound → spreadWec ≈ 5
Spread → splashWec = 1,320 × La−0.18